Addition
-3+7
4
5 - (-6)
11
-7 x 9
-63
12/-6
-2
A submarine was 25 ft below sea level. It dove 42 ft. What was its new depth?
-25 - 42 = -67 feet
-18 + (-8)
-26
75 - 86
-12 x - 3
36
-32/-4
8
This morning it was -40 Celsius. By the afternoon the temperature had increased 12 degrees. What was the temperature?
-40 + 12 = -28 degrees Celsius
-41 + 34
-26
-59 - 67
-126
32 x - 5
-160
66/-11
-6
Anna is a microbiology student. She was doing research on optimum temperature for the survival of different strains of bacteria. Studies showed that bacteria X need optimum temperature of -31˚C while bacteria Y need optimum temperature of -56˚C. What is the temperature difference?
-31 - (-56) = 25 degrees
-702 + (-481)
-1183
-92 - (-85)
-7
-8 x -44
-92/2
-46
A submarine was 850 ft below sea level. It rose 325 ft. What was its new depth?
-850 + 325= -525 feet
-2945 + 2945
0
-1928 - 475
-2403
317 x -5
-1585
-125/-25
5
The population in Hewlett has decreased by 159 residents over the past 3 years. The same number of residents left each year. What was the change in the town's population each year?
-159/3= -53